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<?php $start = 6; $list = [ '1楼', '2楼', '3楼', '4楼', '5楼', ]; $list = array_flip( array_map(function($key) use ($start) { return $start + (int)$key; }, array_flip($list)) ); var_dump($list);
Output for git.master, git.master_jit, rfc.property-hooks
array(5) { [6]=> string(4) "1楼" [7]=> string(4) "2楼" [8]=> string(4) "3楼" [9]=> string(4) "4楼" [10]=> string(4) "5楼" }

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